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About one third of breast cancers diagnosed with screening mammography will not progress to advanced disease (JW Womens Health Nov 21 2012). However, estimates of overdiagnosis rates vary widely. Investigators in Australia conducted focus groups in mid-2011 to assess women's awareness of breast cancer overdiagnosis; participants also were asked how published prevalence estimates of such overdiagnosis would affect their screening choices. Eight age-stratified focus groups comprised a total of 50 women from diverse cultural and socioeconomic backgrounds.
Before participating, few women were aware of breast cancer overdiagnosis, although some knew about overdiagnosis associated with prostate cancer screening. By the end of the sessions, most wo…